Diagnosis by Boiler Type: Combi vs. System vs. Regular
The way an ignition lockout presents, and our diagnostic approach, shifts depending on your boiler type. With modern combi boilers, common in newer properties or refurbished Victorian terraces around Whelley, the fault is usually immediate and often displays a specific error code. For system boilers, particularly those with external hot water cylinders, a gas supply issue might only become apparent when the cylinder demands heat, not necessarily during a tap call. Regular boilers, often found in older 1930s semis toward Beech Hill, are simpler; if the pilot light is out or flickering, that’s a direct indicator of an ignition or gas flow problem. We factor in these system specific behaviours during our initial assessment.
- Combi boilers: Immediate fault code, direct ignition failure.
- System boilers: Lockout may occur with cylinder heat demand.
- Regular boilers: Pilot light status is a key indicator.

